Is this a good thesis statement? police action is an efficacious and ofttimes necessary measure because diplomacy isn’t always an effective method of resolving international crises.

it's called a epic poem i believe, hope this ☺

as for symbolic actions, the narrator's tearing down the wallpaper in an attempt to find the "woman" in the wallpaper represents her struggle to retain or regain her sanity.   the wallpaper has been part of her confinement and by her tearing it down, she is freeing herself from that confinement.